A commentary and correction on the article “Pansharpening by exploiting sharpness of the spatial structure”

ABSTRACT

This study clarifies the implicit potential deficiency caused by the sparse cardinality parameter k in Rong et al. (2014). In addition, k = β × W × M × N (0.9 ≤ β < 1) is suggested to avert this potential deficiency, where β is a ratio controlling the amount of sparse cardinality, W is the number of multispectral bands and M × N is the size of panchromatic image. With the choice of k suggested in this study, the low rank matrix L and sparse matrix S obtained by Go Decomposition (Zhou and Tao 2011) can be iteratively optimized and solved. Thus, instead of choosing k as W × M × N in Rong et al. (2014), the potential deficiency that L is directly obtained as an analytic solution can be averted.

Acknowledgements

The authors would like to thank the editor Prof. Timothy Warner and the anonymous referees for their invaluable comments and suggestions which helped in improving the quality of this commentary. Thanks would also give to DigitalGlobe and Global Land Cover Facility for freely providing the WorldView-2, QuickBird and IKONOS data, respectively.

Disclosure statement

No potential conflict of interest was reported by the authors.